The Bilateria and bilaterian phylogeny

Question 1

What are the three great clades of the bilateral?

how are they related

Answer 1

• Lophotrocozao (A)
• Ecdysozao (B)
• Deuterostomia (C)

(C, (A,B))

Question 2

What aspects of symmetry was previously used to build trees?

Answer 2

• Symmetry
• Germ layers
• Body cavities
• Segmentation
• Embryo Cleavage

Question 3

What is the problem with Long branch attraction?

Answer 3

When two branches of a phylogeny are independently gathering a lot of mutations, programs tend to put them together

• this is due to convergent traits arsing.